(1) Five (5) or more or a majority of the users of water from any water system may petition the director to request the attorney general to file an action to commence a general adjudication. If the director deems that the public interest and necessity will be served by a determination of the water rights of that water system, the director shall request the attorney general to file an action to commence the general adjudication.
(2) If the director deems that the public interest and necessity will be served by a determination of the water rights of any water system, the director, upon his own initiative, may request the attorney general to file an action to commence a general adjudication.